TULSA, Okla. -- Several Midwestern U.S. states were under ice storm warnings Monday following a slick, accident-filled weekend.

Ice warnings were posted in Missouri and Oklahoma with the National Weather Service in Tulsa, Okla., calling for as much as half an inch of ice accumulation in northeastern Oklahoma, the Tulsa World reported.

The storm was expected to affect the region through Wednesday, reports said.

The Belleville (Ill.) News-Democrat quoted forecasters as advising drivers to use particular caution on bridges and overpasses.

Earlier in the weekend, Des Moines (Iowa) Police Department spokesman Sgt. Roger Stiles told the De Moines Register the force had received reports of 30-50 vehicle accident calls by Saturday evening but no serious injuries were reported.

By Sunday, much of the ice-slicked parts of the state were under as much as 5 inches of snow, the report said.

There were scattered power outages throughout the region during the weekend due to ice buildup on power lines, the reports said.